Pitch-indicating device for graphophones and the like.



PATENTED DEC. s, 1907.

T. ZOEBL. PITCH INDIGATING DEVICE FOR GRAPHOPHONES AND THE LIKE.

APPLICATION FILED MAR. 18, 1907.

WT/VESSES G fJVVEA/Z'OR zwar 5%? THEODOR ZOEBL, OF CHICAGO, ILLINOIS.

PITGH-INDICATIN'G DEVICE FOR GRAPHOHONES AND THE LIKE.

Specification of Letters Patent.

Application filed March 18, 1907. Serial No. 362,826.

latented Dec. 3, 1907.

To all whom it may concern:

Be it known that I, Tnnonon ZonBL, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Pitch-Indicating Devices for Graphophones and the Like, of which the following 1s a complete specification.

This invention relates to improvements pitch indicatin devices for graphophones and the like an more particularly to a pitch indicating device adapted to be adjusted to me'etthe. varying requirements caused by wear of the speed regulatingdevic'e oi the machine.

The object of this invention is toprovide a pitch indicating device'by means of which the speed of the recordmay be regulated to.

produce any desired pitch in the reproduc tion of sounds, andin which it will only be necessary to primarily adjust the device to a igriven tone, as for instance middle C, and

om that tonelas a starting point the speed of the record may be adjusted to give any desired pitch.

It is also an object of the invention to rovide a very cheap and simple device w 'ch will not readilyget out of adjustment and which is capable of being attached to any of the ordinary makes of sound reproducing instruments.

The invention consists of the matters hereinafter described'in the s ecification and outer face View of the pointer. side elevation thereof.

more fullypointed out and efined in the ap-. pended claims.

In the drawings: Figure 1 is a view, partly in section and partly in elevation, of a speed governor of a graphophone and having a pitch indicating device, embodying my invention, attached thereto. Fig. '2 1s a front elevation of the locking collar. Fig. 3 is an Fig. 4 is a Figx5 is a front view of the scale disk, and Fig. 6 is a pers ective view of a graphophone provided wit a device embodying my invention.

' As shown in said drawings: 1 indicates the governor of a graphophone or other sound reproducin instrument, and 2 indicates the riction isk thereon, a ainst which bears one end of the bell crank rake lever 3 which is pivotally supported adjacent said disk. The other arm of said lever is engaged by the inner end of the tubular adjusting rod 4 which projects through the wall 4. ol' the.

grapho hone and has threaded engagement in the hearing member 5 supported in any suitable manner in the graphophone casing. Said rod is provided with a shoulder 4 near said bearin and a spring 5 bears at one end against sai shoulder and at the other end against said bearing and acts normally to prevent the rod fromturning. A pin 6 is carried in said rod and projects from the inner end thereofand engages a spring 6 car- .ried on said lever which acts to provide a uniform pressure of the bearing end of the lever on said disk. All of said parts are of the usual construction and are shown for the purpose of more clearly explaining the oper ation of the pitch indicator. The outer end of said rod 4 is reduced insize and ri idly engaged thereon is a flanged collar 7, tl ie'flange of which is spaced a sufiicient distance from the wall 4 to permit the rod to be adjusted longitudinally-1n either direction, and 1s r0 vided in its outer face with a plurality o indentations 7 arranged concentrically with the bore of the collar, as shown more clearly in Fig. 2. a I

A pointer 8 is provided in one end with an aperture to receive the rod a and on its inner face, or that adjacent the collar, is a projection 8 adapted to fit inthe indentations in the flange so that the pointer may be adjusted without rotating the rod. Near its 0 po-' site end said pointer is provided with a utton or knob 8 by means of which it may be adjusted. The end of the'rod A, outwardly from the pointer, is screw threaded and engaging thereon is a lock nut 9 and a nut 99 by means of which the pointer is rigidly locked in place against the collar.

I A scale disk .10, of any preferred material, is rigidly engaged in any desired manner on the Wall 4; of the graphophone, but as shown it is rovided with apertures 10 near the perip ery thereof to receive screws or other attaching means. Said disk, as shown, is provided with a straight up er' margin 10 adapted to fit closely beneath the top plate '4 of the graphophone, when in position, so that no skill is necessary to properly adjust it. A slot 10 through which the rod profijects, extends downwardly from the edge 10 a sufilcient distance so that the axis of said rod coincides with that of the disk. Said disk, as shown more clearly in Fig. 5, is provided with a plurality of musical symbols 10 indicating various degrees of pitch and in aca given tone, for example middle cordancewith which the pointer is adjusted to give the proper speed to produce the desired tones.

The operation is as followsz The disk is attached to the wall of the graphophone in such manner that the rod protrudes through its slot and the speed of the record is ad-' justed by means of said rod so as to reduce The pointer is then turned to middle (3 on the disk,

and locked in place by means of the lock nut.

Then by turning the rod in either direction the pointer is moved over the scale to any other symbol and the adjustment of the rod causes a corresponding increase or decrease of speed of the record and produces a correspending-1y higher or lower tone. The scale .is also provided with a series of numerals near its periphery corresponding with the 1 various symbols, so that the pitch may be adjusted according to number if the operator is not familiar with the musical symbols.

Obviously many va'riationsof' the-scale on the. disk may be provided and the device may be attached to any of the usualtypes of sound reproducing machines and many details of construction may be varied without departing from the principles of'my invention.

Iclaim as my invention:

1. In a device of the class described the combination with 'a casing 4, of a speed governor therein, an adjusting rod 4 for said governor extending outwardly from the casing, a circular scale plate 10 engaged onsaid'casing, having a radial slot 10. therein through which said rod passes and having a straight u peredge at the top of said slot adapted to a ut against the top of the casing, a chr0- matic' scale on said plate, arranged concentrically with its axis and having the symbols 10 thereof increasing in distance apart from the beginning to the end of the seal, -a flanged collar 7 on said rod, having a plurality of concentrically arranged indentions in its outer face, a pointer 8 onsaid rod having a projection 8 adapted to fit in said indentions and a lock nut on said rod adapted to lock the pointer in adjusted position with respect to said late.

2. In a device of the class described the combination with a speed governor of a tions 7 in its outer face, a

graphophone, of an adjusting rod 4 therefor,

a flanged collar 7 rigidly engaged on-said rod and provided with a*plurality of indentaointer 8 rotatively engaged on said rod and provided with a projection 8 on its inner face adapted to engage in any of said indentations, anut 9 on said rod adapted to rigidly hold said pointer against the collar, a set 9 therefor, a

disk IOhaving a straight upper edge and a radial slot extending downwardly therefrom adapted to receive said rod, achromatic scale on said disk arranged concentrically with the rod and the symbols thereof being arranged at varying distances apart, and numbers on said disk corresponding with the symbols.

3. In a device of the class described the combination with a casing, of a speed governor therein, a rotary adjusting rod for said governor and projecting through the wall of the casing, a flanged collar rigidly engaged on the outer end of said rod having a plurality of indentations therein, a pointer adjustably on the rod and provided with a projection adapted to engage in said indentations, means for locking the pointer in adjustt speed regulating rod projecting therefrom,

a stationary disk slotted to receive said rod and having a straight upper side adapted to engage beneath-the top of the casing, a plurality of symbols on said disk indicating musical tones, a collar on said rod having a plurality of indentations therein, a pointer on the rod and having a projection thereon.

adapted to engage in said indentations and lock nuts carried on the rod for ldcking the pointer in adjusted position.

In testimony whereof I have hereunto subscribedmy name in the presence of two witnesses.

TIIEODOR ZOEBL.

Witnesses J. C. GOOSMANN, A. PRAZs Y. 

